...
There was an interruption in ping responses from SLAC to Sumy National Agrarian University (www.snau.edu.us address 5.9.136.198) following November 11 07:00 until Nov 14 02:00 GMT. Also starting around November 1st 2022 there was quite a dramatic increase in ping response losses. Then starting Nov between 21:30 and 21:59 there was a drop in minimum ping response times to 160 ms from 179ms as well as almost no ping losses persisting at least until January 4, 20023.
Mariupol
The last ping response PingER was able to get from en.mdu.in.ua was from just before midnight May 20, 2022. This corresponds to the fall of Mariupol (https://en.wikipedia.org/wiki/Siege_of_Mariupol) to Russian forces.
...